<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-show指令</title>
</head>
<body>
    <div id="app">
        <input type="button" value="切换显示状态" @click="changeIsShow">
        <input type="button" value="累加年龄" @click="addAge">
        <img src="./img/houzi.jpg" alt="" v-show="isShow">
        <img src="./img/houzi.jpg" alt="" v-show="age>=18">
    </div>
      <!-- 开发环境版本，包含了有帮助的命令行警告 -->
      <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"> </script>

      <script>
         //创建vue实例
      var app = new Vue({
      el: '#app',
       data: {
        isShow:false,
        age:17
         },
         methods:{
             changeIsShow:function(){
                 this.isShow=!this.isShow;
             },
             addAge:function(){
                 this.age++;
             }
         }
    })
  </script>
</body>
</html>